The telltale tooth of a Tyrannosaurus rex found embedded in the tail of a plant-eating dinosaur provides long-sought proof that the famous carnivore hunted and killed its prey, paleontologists announced…

Like Darwin’s many finches living side-by-side in the Galapagos Islands, a surprising variety of feathered, bird-like dinosaurs once roamed the ancient West from Alberta to Texas, scientists say. A team…

A petite and exquisitely preserved 50-million-year old fossil reveals the remains of a lustrous black bird that was the precursor to today’s hummingbirds, researchers say. The fossil bird, originally excavated…